I've played the keyboard for a year or two as a child but really want to take up the Piano now and I'm just wondering is it possible to practice using my old keyboard while at home or would I really need access to a piano?

This is my sandvich. There are many others like it, but this one is mine. My sandvich is my best friend. It is my life. I must master it as I must master my life. Without me, my sandvich is useless. Without my sandvich, I am useless. I must eat my sandvich true. I must shoot straighter than my enemy, who is trying to kill me. I must shoot him before he shoots me. I will. Before lunch I swear this creed: my sandvich and myself are defenders of my country, we are the masters of our enemy, we are the saviors of my life. So be it, until there is no enemy, but sandvich. Om nom.